Samuel f



S. 1?. GOLD. Steam-Heater.

Patented Mal-.116, I880. Zia.-

N-PETERS, PHOTO-LITNOQRAPHEIQWASHINGTON D. O

= the line a: to of Fig. 1.

UNITED STATES PATENT OFFICE.

SAMUEL F. GOLD, OF ENGLEWOOD, NEW JERSEY. I

STEAM-HEATER.

SPECIFICATION forming part of Letters Patent No. 225,472, dated March16, 1880.

' Application filed July 14, 1879.

To all whom it may concern: 7

Be it known that I, SAMUEL F. GOLD, of Englewcod, in the county ofBergen and State of New Jersey, have invented certain new and usefulImprovements in Steam-Heaters for Warming and Ventilating Buildings; andI do hereby declare the following to be a full, clear, and exactdescription of the same, reference being had to the accompanying drawings, making part of this specification, in which Figure 1 of saiddrawings represents a fragmentary portion of a steam-pipe with coiledwire attached thereto. Fig. 2 is a central section of the same. Fig. 3is a cross-section at Fig. 4 represents a ring having pins and slots forsecuring the wire coils. Fig. 5 represents a modification of myimprovements, and consists in a series of rings, with pins, upon asteam-pipe.

This invention relates to apparatus for warming and ventilatingbuildings by means of a current of air passing in contact with surfacesheated by steam, and has for its object the increase of theheating-surface of the pipes, thereby imparting a ver much larger amountof heat to the air passing over them, being in efl'ect equivalent to themultiplication of the length of the pipes used and the economization ofthe space occupied by the heating-sun face, as hereinafter more fullyset forth.

To this end the said invention consists in providing a series ofsteam-pipes, (usually called a boX-coil,) as employedin steam-heating,and forming around each pipe of the same certain metallic surfaces, soarranged as to divide, subdivide, or split up the current of air in itspassage upward around the pipes, whereby it is more perfectly heated.

To effect this result a coil of about one-half inch diameter, more orless, made of metallic wire, say No. 14, is formed into a double .orcompound coil, B, by being Wound around the pipe A, which coil, byreason of its elastic force and spiral form, closely embraces andpresses the pipe at every point of contact therewith.

By this arrangement of the coil close contact with the hot pipe issecured and a very great length of extended wire surface may beutilized. Necessarily a very large volume of heat must be conducted intothe current of air passing through and over the coil.

By this form of construction the current of air is caused to pass nearlyor quite around the pipe, instead of being deflected from it, as it isfrom plain pipe, for it will be observed that when the air strikes thewires on the under side of the pipe it necessarily finds its freestpassage upward through the circular channels formed by the coils,and istherefore conducted around the pipe, bringing the entire surface of thepipe and the heated wire into action, whereby the air is more thoroughlyheated.

By this construction fewer pipes can be used in forming a heating-stackon account of the increase of surface by means of the Wire coils, and,as an additional advantage of fewer pipes, the successfulpassage ofsteam through them is insured without danger of the freezing of thewater of condensation, which diffi culty is apt to occur where largecoils of pipe are used.

The rings 0 G are provided with slots and pins, which are used forsecuring the ends of thewire coils, as seen at a, Fig.

The rings are made adjustable and capable of being keyed fast at an ydesirable point along the pipe.

I am aware that coils of metallic wire have been employed to'enlarge thearea of heatingsurface, as set forth in Letters Patent of the UnitedStates granted to Edmund Russell, July 6, 1875, which shows coils ofmetallic wire introduced between loop-pipes, and also a single wirewound around then; but these are not the features claimed in myinvention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-- 1. The combination of the steam-tube A with thecompound coil B, substantially as shown and described.

2. The combination, with the steam-tube A, of the rings 0 and O and thecompound coil B, substantially as shown and described.

SAMUEL F. GOLD.

Witnesses:

. D. A. GURRIE,

LUOIUS ROOKEFELLER.

